35000 a BP以来四川洪雅的孢粉记录与气候变化  

Sporopollen records and climate changes since 35 000 a BP in Hongya,Sichuan Province

作　　者：石胜强[1] 袁道先[1,2] 罗伦德[1] 赵增友[1] 郝秀东[1] 

机构地区：[1]西南大学地理科学学院,重庆400715 [2]中国地质科学院院岩溶地质研究所/国土资源部、广西壮族自治区岩溶动力学重点实验室,广西桂林541004

出　　处：《中国岩溶》2012年第2期121-130,共10页Carsologica Sinica

基　　金：国土资源部、广西壮族自治区岩溶动力学重点实验室开放课题基金项目(KDL2008-15);西南大学青年基金项目(swu208001);现代古生物学与地层学国家重点实验室开放基金项目(073112)

摘　　要：运用古气候参数方法对四川洪雅GMH剖面进行孢粉分析,结合定年数据,分析出本区自晚更新世晚期以来的植被变化和气候变化并与我国南方石笋记录等进行对比分析。研究表明:从大约35 670aBP以来,四川洪雅地区总体经历了暖湿—温润—凉干—温润—冷干—温湿—凉润—暖湿—温润的气候变化过程,其间多有反复;GMH剖面孢粉记录与我国南方石笋记录在古气候变化的大趋势上基本一致,对H3、H2、H1、YD等气候事件反映明显;E带(21 100-17 000a BP)对应的降温减湿期较石笋记录提前出现与研究区位于第一、二级阶梯过渡地带、山前台地的地貌特征有关;对比发现I带中的温干气候期(约2 150aBP前后)具有一定的区域性意义。Sporopollen analysis on the GMH section in Hongya County,Sichuan Province is done by means of paleo-climate parameter methods and changes in paleo-vegetation and paleo-climate during later period of the late Pleistocene is reconstructed in combining with dating figures in the paper. Furthermore, comparative a- nalysis with the stalagmite record from South China is done. The results show that： the process of paleo-cli- mate change in Hongya is warm and wet-moderate and moist - cool and dry - moderate and moist - cold and dry-moderate and moist - cool and moist - warm and wet - moderate and moist from about 35 670 a BP and there are some reversals in the process; GMH sporopollen record shows nearly same trend of paleo-climate change in contrast with the stalagmite record in Dongge Cave and Hulu Cave, and the climate events inclu-ding H3, H2, H1, YD appeared in the pollen record obviously; the colder and drier process in E-zone（21 100-17 000 a BP）occurred earlier than the stalagmite record,it is due to the landform characteristics in the research area that locates in the transition zone from Tibetan Plateau to Szechwan Basin and the section is in a platform front of the E-mei mountain; the moderate and dry period in I-zone （about 2 150 a BP） has certain regional significance.

关 键 词：孢粉记录 孢粉带 植被 气候变化 石笋记录 四川洪雅地区 

分 类 号：P532[天文地球—古生物学与地层学] Q914.81[天文地球—地质学]